Tightness testing tool – Tightester XL

The Tightester tightness testing tool is a Made in Camas technology used for measuring variations in pressure or flow, intercepting leaks and satisfying the most stringent tightness testing criteria.

Directly coupled with a remote transducer, it can be placed directly alongside the piece, optimizing testing volumes, with 19-bit resolution for observing pressure variations less than one tenth of a Pascal.

This device represents the heart of the tightness testing system designed by Camas. The display visualizes pressure progress, which can be quite useful for identification of correct parameters. The result is expressed in pressure drop or in cc/h hourly loss.

The Camas Tightester can be used as a stand-alone unit or integrated into the machine. Various tightness testing sets can be set up and saved into the unit, or they can be integrated into an automation cycle, communicating with the unit via Ethernet.

The tightness testing types are several:

This is one of the most widespread tight testing methods. It consists of measuring the drop in pressure inside a pre-pressurized volume.

The drop test can detect losses of up to 10 -3 L*mbar/s, and is highly accurate even with low pressures and small volumes; when volumes or pressures are larger and the leaks to be intercepted are very small, variations in the method can be used to monitor successfully.

Differential tight testing is one of the testing technologies employed by Camas. It consists of measuring the pressure differential between a reference volume and the piece being tested by means of a differential transducer.

The use of a reference volume allows to minimize the effects of air temperature change when the air enters for testing. Because both branches are filled at the same time, some phenomena offset each other and mostly compensate. Only a leak on the test piece will create an imbalance in the testing circuit, detected by the transducer. The second advantage of this method is that its accuracy does not decrease as the test pressure increases, since the transducer is measuring a difference in pressure between two circuits. This differs from traditional pressure drop technology that measures the drop in pressure with respect to the atmosphere.

Tight testing in chamber is one of the technologies Camas uses in testing. The piece to test is isolated in a chamber, and pressurized. A leak will cause a change in the pressure inside the chamber; since the chamber is not pressurized, excellent results can be achieved very rapidly, even at pressures of dozen of bars.

A change in pressure in the tank signals a leak in the piece being tested.